Thanks for the measurements and the input!
I feel dumb, but didn't realize I could just go to TSC and buy a generic one....thought it needed to be specific for the machine.
I use my drawbar frequently...moving utility trailer, boats, and big trailer around. Really useful when I'm picking up bales...from the bailer to the trailer to the barn. I recommend getting one. Check out craigslist, eBay, local farm supply store. Get 1 7/8" and 2" balls for it.